Removable-barrel mounting for automatic firearms



Aug. 16 1927. 1,639,277

C. SONCINI REMOVABLE BARREL MOUNTING FOR AUTOMATIC FIREARMS Filed June 17, 1925 Cesa e Jane 4 71.4

Patented Aug. 16, 1927.

UT STATS CESABE SONCINI, OIEIBRESCIA, ITALY, ASSIGNOR TO SOGIETA ITALIANA ERNESTO BBEDA, OF MILAN, ITALY, A JOINT-STOCK COMPANY.

REMOVABLE-BARREL MOUNTING FOR AUTOMATIC FIREARMS.

Application filed June 17, 1926, Serial No. 116,659, and in Italy June 20, 1925.

connecting sleeve. having a large, long1tu-- dinal top opening, a specially-formed front -opening which permits the barrel to be n- H) clined therein on being taken out or set 1n,

and a specially-formed rearopening provided with a transverse slot in which is mounted a locking sector for retaining the .-barrel, once the latter has been introducedinto the aforesaid rear opening.

The accompanying drawing shows one embodiment of the invention, in which:

'Figure 1 is a partsectional, fragniental view of afire-arm equipped with the lnvention,..and withathe barrelin place;

Fig. 2 is a similar View, but show1ng the barrel in inclined position prior to being taken ofi or set in;

Fig. 3 is a cross-section on hne 33 of Fig;:1;.and

4 is a viewsimilar to Fig. 3, but with the locking sector lowered and the barrel taken out. l i Referring-moreparticularly to the drawing,-1indicates thesleeve for connectlng the barrel 5 to-the end 2 ofthe weapon, WlllCh sleeve has its rear end 1 fitted over the rednced .portion 2 of said weapon end; the parts .1 and 2 being formed with registering semi-circular slots 3 and 3 deslgned to receive a locking sector or catch 6 that 1s pivotally mounted at one end inslot 3, as indicated at 6.. v v

The rear end 5 of the barrel lS llkBWlSG 4o reduced to enable it to pass through the interfitting parts 1', and 2 and to pro ect into the bore of a block 9 secured to or integral with the frame of the gun; the wall of said bore having formed in it an annular groove 7 and a pair of oppositely-located longitudinal grooves 7 (Fig. 2), only one of the latter grooves appearing, however. Portlon 5 of the barrel is provided adjacent its free end with a pair of diametric lugs 8, 8 and in front of and substantially in line with the lower lug 8, it is further provided with a depending projection or finger 4. The rear lugs 8 and 8' are designed to be slid rearwardly through the grooves 7 which, of

5.6 course, lead from the front end of block 9 to the annular groove 7, so that when said lugs reach groove 7 the barrel can be rotated by means of its handle 10, thus bringing them into the position illustrated in Fig.1, in which the barrel is locked against endwise movement.

The catch or sector 6 mentioned above is utilized, in conjunction with the projection {l on the barrel part 5, to lock the barrel against rotation after said part has been locked to block 9, :as just explained. It will be observed from Fig. 3 that the size of the catch is such that it can occupy not only the outer slot 3 but also the inner slot 3" (or to be more precise, a portionof slot 3), and thatit has a notch or seat 12 (Fig. 4:) formed in its inner edge to receive the finger 4, thus preventing the barrel from turning. The catch itself is held in place by means of a rotatable locking screw or detcnt 13 which it carries at its free end, and the pointed end of which engages in a sea-ti l (Fig. 4) in the end portion 1' of sleeve 1.

To take down the barrel, it is merely necessary to release detent 13 from its seat 14 and then move catch 6 out of slots 3, 3' into the position represented in Fig. 4. This unlocks the barrel and enables it to be rotated so as to bring lugs 8, 8 into line with grooves 7, wherea-fter the barrel can be drawn forward until its reduced rear portion 5' is clear, of the inter-fitting tubular parts 1, 2. The barrel canthen'be raised or tilted into Fig. 2' position, due to the special construction of its front end 11 which, as shown,has the wall 11 of its opening tapered or inclined upwardly .and rearrearwardly; and, on assuming this position, can be moved backward through said openingand thus withdrawn from the connecting sleeve.

The barrel can be put back, or a new barrel put in, by carrying out the above operations in inverse sequence.

Modifications and changes in the form and dimensions of the various parts can obvious 1y be made within the scope of the invention.

Having now described my invention. what I claim as new and desire to secure by Letters Patent is:

1. A device for fixing the barrel in auto matic fire-arms in such a way as to allow a quick and easy removal or replacement of said barrel, characterized by a connecting sleeve having a large longitudinal top opening, a front opening shaped topermit the sleeve for connecting the barrel to the lirearm and wherein the barrel fits, said sleeve having a tubular rear portion which is adapted to receive the corresponding por tion of the barrel and which is provided with a slot; and a catch pivotally mounted in said slot and having a seat to'receive said projection and thereby lock the barrel against rotation in the sleeve.

3. In a removable barrel mounting for automatic lire-arms, the combination, with a barrel having a reduced rear portion provided with a depending projection; of a sleeve for connecting the barrel to the firearm and wherein the barrel tits, said sleeve having a tubular rear portion which is adapted to receive the corresponding portion of the barrel and which is provided with a slot; and a locking sector pivotally mounted at one end in said slot and provided at its other end with a detent adapted to engage a seat insaid sleeve portion so as to lock the sector in place, said sector having a centra-l seat in its inner edge to receive said projection and thereby lock the barrel against rotation in the sleeve.

4. In a removable barrel mounting for automatic firearms, the combination, witha barrel having a reduced rear portion provided with a depending projection; of a sleeve for connecting the barrel to the firearm and wherein the barrel fits, said sleeve having a tubular rear portion which is adapted to receive the corresponding portion of the barrel and which is provided with a slot; a catch pivotally mounted in said slot and having a seat to receive said projection and thereby lock the barrel against rotation in the sleeve; and means, independent of said catch, for locking the barrel against endwise movement in said sleeve.

5.'In a removable barrel mounting for automatic fire-arms, the combination, with a barrel; of a sleeve for connecting the bar-- rel to the fire-arm and wherein the barrel lits, said sleeve having a large longitudinal top opening and a front opening shaped to permit the barrel to be tilted upwardly into inclined position therein and then removed through the top opening; and means carried by the sleeve at its rear end for engagement with the rear portion of the barrel to lock the latter in'place.

6. Ina removable barrel mounting For automatic lire-arms, the combination, with a barrel; or a sleeve for connecting the barrel to the fire-arm and wherein the arrel lits, said sleeve having a large longitudinal top opening and a trontopening shaped to permit the barrel to be tilted upwardly :nto inclined position therein and then removed through the top opening; and means engageable with the rear portion of the barrel to hold the latter against endwise movement into tilting position.

7. In a removable barrel mounting for automatic firearms, the combination, with a barrel; of a sleeve for connecting the barrel to the fire-arm and wherein the barrel lits, said sleeve having a large longitudinal top opening and a front opening shaped to permit the barrel to be tilted upwardly into inclined position therein and then removed through the top opening; and separate means engageable with the rear portion of the barrel to lock the latter against endwise and rotary movement in the sleeve.

8. In a removable barrel mounting for automatic lire-arms, the combination, with a barrel; of a sleeve for connecting the barrel to the fire-arm and wherein the barrel fits, said sleeve having a large longitudinal top opening and a front opening shaped to permit the barrel to be tilted upwardly into in clined position therein and then removed through the top opening; and means for locking the barrel against movement into tilting position.

In testimony whereof I affix my signature.

CESARE SONGINI. 

